#include <iostream>
#include <fstream>
#include <string>

using std::cout;
using std::endl;
using std::ifstream;
using std::string;

void test(){
    ifstream ifs;
    ifs.open("text1.cpp");

    ifstream ifs2("test2.cpp");

    string filename = "test3.cpp";
    ifstream ifs3(filename);

}

int main()
{
    test();
    return 0;
}

